Answer: When you create a document in Microsoft Publisher or any desktop publishing program, in order for others to open and view the file they would normally have to have the same program. If they don't, there are ways you can convert your creation to a format that others can use.
For other uses, see Epidemiology (disambiguation). Epidemiology is the study and analysis of the patterns, causes, and effects of health and disease conditions in defined populations. It is the cornerstone of public health, and shapes policy decisions and evidence-based practice by identifying risk factors for disease and targets for preventive healthcare.
An epidemiologist is a person who studies patterns of diseases or health risks in population groups, societies, and cultures. He or she may look at how diseases affect certain populations, the emergence of viruses in geographical locations, or he or she may track certain diseases.n epidemiologist may study car crashes as it relates to injuries. An epidemiologist may work with doctors and other health care workers to address specific health issues.